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A Week on the Campaign Trail With Jonathan Karl

The chief White House correspondent of ABC News races to cover Donald Trump

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Jonathan Karl

Oct. 12, 2016 9:56 a.m. ET

5:02 a.m. After turning off my alarm, I hit the “How did you sleep?” tab on my Fitbit app. I got exactly 5:02 hours, having apparently conked out right at midnight. After months covering the presidential election, an earlier fitness tracker at one point helpfully reminded me that lack of sleep can have the same effect on mental capacity as being drunk.

At 7:05, I appear on “Good Morning America” from the Washington bureau of ABC News and then rush for Reagan National Airport. I’ve learned that if I leave the bureau before...